I placed it on my server and it seemed to work fine until I logged out and tried to log back into it, it told me the mod wasn't save/load compatible. Hopefully this keeps other people from downloading this mod until it's updated. I'd like to also say thank you Therax for creating this mod, it's great when it works.

This looks like a pretty rare case, involving disconnecting from a server while a GUI for a miniloader is open. I'll look into addressing this for the next release. In the meantime restarting the server should allow you to connect again.